Coulomb's Law and Charge

If one of the charges doubles, what happens to the force?

• it doubles

• it gets cut in half

• it quadruples

• it is cut by 1/4

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What would a negative value for F_e mean?

• The particles are moving away from each other

• The particles have the same charge

• The particles have opposite charges

• The particles are moving towards each other

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What kinds of particles do Coulomb's Law apply to?

• electrons

• protons

• neutrons

• neutral atoms

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The variable "r" in Coulomb's Law would have what units?

• Joules

• Coulombs

• Newtons

• Meters

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Which is the value of the constant in Coulomb's equation?

• k_e = 9·10^-9

• k_e = 9.8

• k_e = 6.67·10^-11

• k_e = 9 ·10⁹

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NGSS.HS-PS2-4

As the value of r increases, what happens to the value of F?

• F increases

• F decreases

• F never changes, q does

• Cannot know from the information

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What is the unit for electrostatic charge?

• Coulombs

• Newtons

• Meters

• Joules

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A repulsive force exists between which two particles?

• Two neutrons

• An electron and a neutron

• An electron and a proton

• Two protons

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What does "r" measure?

• the distance between the two charged objects

• the amount of charge carried by the objects

• the amount of force between two charged objects

• the constant value for forces between the objects

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NGSS.HS-PS2-4

What does F_e stand for?

• the electrostatic force

• the symbol for iron

• the constant for the charges

• the charges of the particles

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